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Two sides of a parallelogram are along the lines, x + y = 3 & x – y + 3 = 0. If its diagonals intersect at (2, 4), then one of its vertex is -

1. (2, 1)
2. (2, 6)
3. (3, 5)
4. (3, 6)

Correct answer: (3, 6)

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